Darcis is the eighth man to retire during a match this week. The Belgian took a medical timeout after 18 minutes of play and was unable to continue.

One of the favorites in the women's tournament, third-seeded Karolina Pliskova, lost on Centre Court. Magdalena Rybarikova beat Pliskova 3-6, 7-5, 6-2 to reach the third round for the second time in 10 appearances.

Pliskova entered the tournament with a chance to take over the No. 1 ranking.

"My expectations were a little bit different than to make one round here," Pliskova said. "That's tennis, you know. Still, you still can play well and you don't have to win. That's my case today."